Where should solder not come into contact with a package?

Solder should not come into contact with the end seal or package body because this can compromise the integrity and functionality of the package. The end seal serves as a protective barrier against environmental factors such as moisture or dirt, which could damage the internal components. When solder contacts these areas, it can create potential pathways for corrosion, contamination, or other forms of damage, leading to possible failures in the electronic assembly.

In contrast, while contact in the corners of the package, on the label area, or on the printed circuit board might have implications, none of those areas are as critical in maintaining the integrity of the sealed environment as the end seal or package body. Understanding the significance of each part of the assembly is vital to ensuring that soldering practices adhere to high standards of quality, as outlined in the J-STD-001 requirements.